Portion of a lighting fixture



FIG. 1 is a perspective view of a portion of a lighting fixture showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof when in use.

The broken lines are shown for illustrative purpose only, and forming no part of the claimed design. 

The ornamental design for a portion of a lighting fixture, as shown and described. 